Today I reassembled fuselage ribs 2 through 5 using the new upper sections, I hope the work & expense is worth it. I also spent a lot of time fettling the bottom corner flanges in the hope of reducing lumps & bumps in the skins, again, we'll see. All mating surfaces have been etch primed with just some over-spray to clean up before attempting to put Humpty back together again.